我没有见过他，所以说不出他的模样。

Not having met him, I cannot tell you what he is like.

youdao

我没有见过任何实验研究证实有100%的覆盖率。

I am not aware of any empirical studies that demonstrate a 100 percent coverage benefit.

youdao

可是我没有见过她呀。

But I didn't see her. '.

youdao

But my guess is there're American Jews who have never met a Palestinian.

但我猜很多美国犹太人,从来没有见过巴勒斯坦人。

普林斯顿公开课 - 人性课程节选

So they've got these superhighways which is, I don't know if you've seen them, they are marked on in blue.

所以，他们修了这些高速路，我不知道你见过没有，他们被标成蓝色了。

伦敦的蓝色自行车 - SpeakingMax英语口语达人

If you have not seen the calculus that I'm about to use on the board, or more likely, if you've forgotten it since high school, don't panic.

如果你们没有见过我将要,在板书上写的表达式,或者说,高中毕业你们就忘了,没关系

耶鲁公开课 - 博弈论课程节选